diff --git a/microwatt.core b/microwatt.core
index a2d6ab5..0d8531e 100644
--- a/microwatt.core
+++ b/microwatt.core
@@ -45,6 +45,7 @@ filesets:
       - wishbone_debug_master.vhdl
       - wishbone_bram_wrapper.vhdl
       - soc.vhdl
+      - xics.vhdl
     file_type : vhdlSource-2008
 
   fpga: